Quantum beats from dressed three-level atoms

T. H. Cheung

Nadeem A. Ansari, Khalid Zaheer

C. Wei, NB Manson, Jpd Martin

Quantum beats can be observed when an atomic system is prepared in a coherent superposition of eigenstates. It manifests the most basic concept of quantum mechanics: coherence, and has been studied extensively. The common configuration for studying quantum beats is that a three-level system interacts with a pulse excitation, where either upper or lower level can be a closely- spaced doublet [1], We report here a new type of quantum beats, dressed-state quantum beats, observed in a three-level pump-probe configuration (Fig. 1). The three-level system and experimental detail can be found elsewhere [2].

Mark P. Silverman

Xiaomin Feng, Lianshui Zhang, Jian Wang +2 more

In a V-shaped three-level double-resonance configuration, there is strong quantum beats superimposed in a nutation signal in the probe laser response. In this paper, the beats in the dressed state nutation is studied theoretically within dressed state picture and the result is presented. An important conclusion is that the strong quantum beats in such a configuration occurred mainly as a result of the intrinsic coherence of the dressed states. Our result extends the coherent transient study in bared atomic transition to dressed state transitions.

Ryuzi Yano, Hiroyuki Shinojima, K. Nakagawa